--- ray/src/rt/rview.c	1991/06/25 14:06:15	1.18
+++ ray/src/rt/rview.c	1991/07/18 14:42:58	1.19
@@ -35,6 +35,7 @@ double  shadthresh = .1;		/* shadow threshold */
 double  shadcert = .25;			/* shadow certainty */
 int  directrelay = 0;			/* number of source relays */
 int  vspretest = 128;			/* virtual source pretest density */
+int  directinvis = 0;			/* sources invisible? */
 
 int  maxdepth = 4;			/* maximum recursion depth */
 double  minweight = 1e-2;		/* minimum ray weight */